EP1524531A3 - System and method for adjusting magnetic center field for permanent mri magnetic field generator - Google Patents

System and method for adjusting magnetic center field for permanent mri magnetic field generator Download PDF

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Publication number
EP1524531A3
EP1524531A3 EP04256350A EP04256350A EP1524531A3 EP 1524531 A3 EP1524531 A3 EP 1524531A3 EP 04256350 A EP04256350 A EP 04256350A EP 04256350 A EP04256350 A EP 04256350A EP 1524531 A3 EP1524531 A3 EP 1524531A3
Authority
EP
European Patent Office
Prior art keywords
magnetic
field generator
field
adjusting
permanent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04256350A
Other languages
German (de)
French (fr)
Other versions
EP1524531A2 (en
Inventor
Bu-Xin Xu
Weijun Shen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Medical Systems Global Technology Co LLC
Original Assignee
GE Medical Systems Global Technology Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GE Medical Systems Global Technology Co LLC filed Critical GE Medical Systems Global Technology Co LLC
Publication of EP1524531A2 publication Critical patent/EP1524531A2/en
Publication of EP1524531A3 publication Critical patent/EP1524531A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

The present invention relates to a method and system (700) for adjusting a magnetic center field of a magnetic field generator in an MRI. One embodiment of the presenting invention relates to a magnetic field generator system (700) having a magnetic center field. This embodiment comprises opposing posts (710) and opposing yokes (720) connected to the opposing posts (710), where at least one of the posts (710) has a spacer (772). At least one permanent magnetic block (730) is connected to at least one of the opposing yokes (720). Further, at least one spacer (772) is formed in at least one of the posts, the yokes and/or the permanent magnetic block.
EP04256350A 2003-10-16 2004-10-14 System and method for adjusting magnetic center field for permanent mri magnetic field generator Withdrawn EP1524531A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/686,972 US6809619B1 (en) 2003-10-16 2003-10-16 System and method for adjusting magnetic center field for permanent MRI magnetic field generator
US686972 2003-10-16

Publications (2)

Publication Number Publication Date
EP1524531A2 EP1524531A2 (en) 2005-04-20
EP1524531A3 true EP1524531A3 (en) 2005-06-15

Family

ID=33160043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04256350A Withdrawn EP1524531A3 (en) 2003-10-16 2004-10-14 System and method for adjusting magnetic center field for permanent mri magnetic field generator

Country Status (4)

Country Link
US (1) US6809619B1 (en)
EP (1) EP1524531A3 (en)
JP (1) JP2005118566A (en)
CN (1) CN1611187A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100581454C (en) * 2006-07-14 2010-01-20 Ge医疗系统环球技术有限公司 Magnetic field generator and MRI device
TW200817669A (en) * 2006-10-14 2008-04-16 Univ Nat Central Non-destructive testing method for a reinforcing bar and device thereof
US9135686B2 (en) * 2006-10-25 2015-09-15 The Invention Science Fund I Llc Distorting feature compensating
US7873234B2 (en) * 2006-11-09 2011-01-18 The Invention Science Fund I, Llc Input compensating for imaging distortion
US8041145B2 (en) 2006-11-17 2011-10-18 The Invention Science Fund I, Llc Distortion compensated imaging
US7667462B2 (en) * 2006-12-22 2010-02-23 Schlumberger Technology Corporation Nuclear magnetic resonance module
JP5535139B2 (en) * 2011-06-30 2014-07-02 株式会社ヴァレオジャパン Proximity sensor
CN111896903A (en) * 2014-09-05 2020-11-06 海珀菲纳研究股份有限公司 Noise suppression method and apparatus
US10539637B2 (en) 2016-11-22 2020-01-21 Hyperfine Research, Inc. Portable magnetic resonance imaging methods and apparatus
CN114496456A (en) * 2022-03-04 2022-05-13 中车青岛四方机车车辆股份有限公司 Integrated suspension electromagnet, linear motor and magnetic suspension train

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239005A (en) * 1984-05-11 1985-11-27 Sumitomo Special Metals Co Ltd Magnetic field generating device
EP0978727A2 (en) * 1998-08-06 2000-02-09 Sumitomo Special Metals Company Limited Magnetic field generator for MRI, method for assembling the same and method for assembling a magnet unit for the same
US20020043975A1 (en) * 2000-10-06 2002-04-18 Sumitomo Special Metals Co., Ltd. Magnetic field adjusting apparatus, magnetic field adjusting method and recording medium
US20030006771A1 (en) * 2001-07-04 2003-01-09 Takao Goto Static field controlling method and MRI apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943774A (en) * 1989-06-01 1990-07-24 General Atomics Magnetic field control apparatus
EP0883143B1 (en) * 1996-10-30 2008-09-17 Hitachi Medical Corporation Superconducting magnetic-field generating device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239005A (en) * 1984-05-11 1985-11-27 Sumitomo Special Metals Co Ltd Magnetic field generating device
EP0978727A2 (en) * 1998-08-06 2000-02-09 Sumitomo Special Metals Company Limited Magnetic field generator for MRI, method for assembling the same and method for assembling a magnet unit for the same
US20020043975A1 (en) * 2000-10-06 2002-04-18 Sumitomo Special Metals Co., Ltd. Magnetic field adjusting apparatus, magnetic field adjusting method and recording medium
US20030006771A1 (en) * 2001-07-04 2003-01-09 Takao Goto Static field controlling method and MRI apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 095 (E - 395) 12 April 1986 (1986-04-12) *

Also Published As

Publication number Publication date
US6809619B1 (en) 2004-10-26
CN1611187A (en) 2005-05-04
JP2005118566A (en) 2005-05-12
EP1524531A2 (en) 2005-04-20

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